audio: Add support for offloading MPEG2 and WMA

Change-Id: I75afa455537cc8aaecd5d5a36ffda9e62785c723
hal: Limit MP2 and WMA offload to 8226/8974 devies only

* 8960 devices are not capable of these features.

Change-Id: I37ee867c4e8377d70344abec5d72a5de86c45ca5